HCPCS Code A0100: Non-Emergency Transportation; Taxi

Obtain a list of the documentation and billing requirements needed to use and bill for HCPCS code A0100 properly.

## **What is HCPCS code A0100?** HCPCS code A0100 is the standardized billing code for non-emergency transportation; taxi. Its primary function is to serve as a payment mechanism for the least complex, yet medically required, mode of patient transport. The essential purpose of this code is to remove the transportation barrier for patients who require medically necessary services but lack a means of getting to the appointment safely. This directly supports the principle that Medicaid (and sometimes other plans) must ensure enrollees have access to covered services. This code specifically refers to a standard taxicab or livery service. It is used when the patient is fully ambulatory or requires minimal assistance and does not need specialized equipment like a wheelchair lift or a stretcher. Meanwhile, the "Non-emergency" designation is critical. It signifies that the patient's immediate medical condition does not require an ambulance (emergency or non-emergency) with medical personnel and life-support equipment. The typical trips include transport to dialysis appointments, chemotherapy/radiation sessions, routine medical or dental checkups, physical therapy, and specialist visits. Do note that this service has a pricing indicator code of 00, which means it's not separately priced by Part B; for example, it's bundled, services not covered, etc. In addition, it has a multiple pricing indicator code of 9, which means it's not applicable as HCPCS is not priced separately by part B, or the value isn't established.

## **HCPCS A0100 documentation requirements** Since A0100 represents a non-emergency service, robust documentation is crucial to establish medical necessity and prevent claim denials. Specific requirements can vary by payer (Medicare, Medicaid, private insurance) and state, but generally include: - **Physician/clinician attestation/order**: Written documentation from the physician or ordering clinician that the transport is medically necessary and that the patient's condition prevents them from using other forms of transportation, such as a personal vehicle, public transit, or rideshare services. - **Trip verification**: Acceptable documentation proving the ride occurred, which may include date and time of the service, origin and destination of the transport (e.g., patient's residence to physician's office, including addresses), patient name, and recipient ID (e.g., Medicaid/Medicare ID, and total Charge for the service. - **Medical record support**: Documentation in the patient's medical record that supports the need for non-emergency transportation due to a specific medical condition or limited mobility. - **Prior authorization**: Many payers, particularly Medicaid and some managed care organizations, require prior authorization for Non-Emergency Medical Transportation (NEMT) services, and the authorization number must be included on the claim.

## **A0100 billing requirements** When billing A0100, healthcare practitioners must consider the following guidelines or requirements: - **Service description**: A0100 is for transportation via a taxi. Ensure the type of vehicle used matches the code. - **Units of service**: Billing guidelines for units can vary. The code may be billed per trip or, in some cases, paired with a mileage code (though the taxi code A0100 is often a base rate for the trip). Consult the specific payer's fee schedule and policy. - **Place of Service (POS) modifiers**: Claims often require two HCPCS Level II modifiers to identify the origin and destination of the transport. Common modifiers include P for physician's office, H for hospital (inpatient or outpatient), R for residence, and N for skilled nursing facility. - **Payer coverage**: The code is frequently utilized by Medicaid for NEMT services. It's often not payable by Medicare or is considered a non-covered service, as Medicare generally has strict criteria for ambulance transport and typically does not cover taxi services. - **Ancillary services**: Any additional fees, such as parking or tolls, may need to be billed with a separate code, such as A0170 (Transportation ancillary: parking fees, tolls, other).

## **Other relevant codes** Relevant HCPCS codes for non-emergency transport include: A0090: Non-emergency transportation, per mile; provided by an individual with vested interest. - **A0110**: Non-emergency transportation; bus, intra- or interstate carrier. - **A0120**: Non-emergency transportation; mini-bus, mountain area transport, or similar systems. - **A0130**: Non-emergency transportation; wheel-chair van. - **A0140**: Non-emergency transport via air travel (private or commercial), intra- or interstate. - **A0425**: Ground mileage, per statute mile (sometimes used with base rate codes) - **T2003**: Non-emergency transportation; encounter/trip (a state-specific code often used by Medicaid).

Frequently asked questions

A0100 is for a standard taxi (non-emergency transportation). A0130 is for a wheelchair van (non-emergency transportation). The choice depends on the specific type of vehicle required by the patient's medical condition.

Yes, a written physician or clinician order/attestation is almost always required to certify that the transportation is medically necessary and that the patient cannot safely use other means of transportation.

No. A0100 is explicitly for non-emergency transportation. Emergency transports require specific ambulance service codes (e.g., A0427 for Advanced Life Support, Emergency).